@Akita Suggagaki : Here are three not so random, but otherwise dicsonnected, thoughts on your OP question.
1. The best evidence based explanation for our (human) existence lies in the context of phsyics, cosmology and evolutionary biology. Our morality derives from the latter and displays the wide range of detailed expression one would expect from such an origin, regardless of what source is claimed for that morality.
2. There appears to me to be a tendency upon the part of some theists and some atheists to overemphasise the importance of competition over cooperation in what morality ought (or does) emerge from evolutionary drives. This often, in my opinion, derails the discussion.
3. And remarkably, for the first time in more than a decade, I find myself agreeing with
@d taylor:
Although I wouldn't say the influence the words said to have been spoken by Jesus
tainted me. Quite the reverse, rather they reinforced evolutionary derived, internal moral compass.